A multi-responsive luminescent sensor for organic small-molecule pollutants and metal ions based on a 4d-4f metal-organic frameworkElectronic supplementary information (ESI) available. CCDC 1527506 (1) and 1527507 (2). For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c7dt00159b

Two silver( i )-lanthanide( iii ) heterometallic-organic frameworks (HMOFs) {[Ln 3 Ag 3 (BPDC) 5 (OX)(H 2 O) 7 ]·7H 2 O} n (Ln = Tb ( 1 ), Gd ( 2 )) have been synthesized via a mixed ligand approach using 2,2′-bipyridine-3,3′-dicarboxylic acid (H 2 BPDC) and oxalic acid (H 2 OX) under hydrothermal conditions. Single crystal X-ray diffraction studies showed a (3,4,5)-connected new topology of {3·4 2 ·5·6 2 }{3·4 3 ·5 2 ·6 3 ·7}{3·5·6 2 ·9·10}{4 2 ·5·6 3 }{4 2 ·5}{4 2 ·6}{4 3 ·5·6 2 }{4 3 ·6 3 }{4 3 ·6 4 ·8 2 ·10}. Luminescence studies showed that the characteristic emissions of Tb 3+ ions are observed in HMOF 1 which can be capable of sensing organic small-molecule pollutants and metal ions. In addition, it can also discriminate the isomers of pentanol as well as quantitatively distinguish benzendiamines which are carcinogenic but used for hair coloring. A multi-responsive luminescent sensor for organic small-molecule pollutants and metal ions based on a metal-organic framework is reported.